Grate-bar.



run snares Parana? GRATE-BAR.

Specification of Letters Patent.

Patented May 18, 19 1a.

Application filed July 21, 1914. Serial No. 852,176.

Bars, of which the following is a specification. v I

' My invention relates to furnaces, particularly to the grate-bars employed therein, and

the main object is to provide such bars which are designed for use in connection with rice,

birdseye, or other line anthracite or bituminous, low grade, fuel, whereby said fuel is retained upon the grate and an even distribution of air supplied thereto in order to secure proper combustion, said air being diffused throughout all the fuel on the grate.

My invention is fully'described in the following specification, of which the accompanying drawings form apart, in which the separate parts are designated by the same reference characters in each of the views, and in which Figure 1 is a plan view of a grate-bar constructed in accordance with 'a present preferred form of embodiment of my in- Vention; Fig. 2 is a section taken on the line 22 of Fig. l; and Fig. 3 is 'a section taken on the line 3-3 of Fig. 1.

In the drawings forming a part of this application I have shown a main member t of relatively thin material, thickened. at its ends, as shown at 5, and provided with longitudinally arranged, dependent, side, flanges 6, said member l being provided with a plurality of symmetrically arranged bores 7 therethro'ugh, preferably, though not necessarily, in straight rows longitudinally and transversely of the member 4, serving as air passages.

- Over each of the bores 7, extending above the upper surface of the member 4, is a projccting cap or boss 8, integral with the member 4 in the form illustrated, and of square formation in plan, the sides thereof being upwardly and inwardly inclined, as shown at 9, and I provide two passages 10 and 11 entirely through the base of said cap or boss and in direct communication with a bore 7, said openings or passages 10 and 11 being at right angles to each other in the form shown, and I provide, as stated, a cap or boss for each hole 7.

The. said caps or bosses are made of such dimensions as to closely approach. each other proper combustion results.

at their bases, whereby substantially llshaped grooves result between adjacent caps or bosses in order to prevent particles Ofi' the fuel from passing to and into theends .of the passages 10 and 11, to clog the same and thus prevent the upward and outw passage of air, said grate-bars being partifc larly designed for use with forced draft although not necessarily, and it will thus be seen that the air is distributed over the "e tire fuel area of the grate-bar ancllpropeiy'lf combustion of the fuel results, and no fuel other than actual dust, may passfdow j wardly between the caps or bosses tofclo'g the air passages. "1,11 I will, in practice, modify the diameters, of the'caps, of the grooves thereb'ctween; and of the passages through sai dcapsto;

adapt the grate bar to different gradesof fuel, but make said passages ofaslarge' a cross, sectional area as is possible murde to secure as great a volume of airthiougln said grate bar as is possible for thdpanj ticular fuel for which it is designed, andI; 0 prefer, as sho\vn, to have the floors of passages flushwith the upper surface'fof the body member 4 whereby the air. fedto" the fuel is always thereunder so that a My invention is very simple in construction, is made of one casting and is, therefore, very durable, assures a thorough distrilultion of air over the grate area, and is well adapted to the purpose for which it is designed, and it will be seen that I may mount the series of bars, one against another, in order to prevent the possibility of fuel falling therebetween, as is now common where the conventional bars are spaced in order to permit the passage of air.

Hav ng fully described my invention, what I claim as new, and desire to secure by Letters Patent, iszf' 1. As an article of manufacture, a grate .bar having a main body portion and a raised portion thereover provided with a series of substantially horizontal, parallel, passages therethrough in one direction, and a supplemental series of similar passages therethrough at an angle to the passages of said first named series, said body portion having a vertical bore beneath and joining each intersection of the respective passages of each series, said raised portion being grooved in its upper surface between adjacent passages of eachseries to intercept all the passages of the other series, to insure complete difiusion of air passing. through said grate bar.

2. As an article of manufacture, a grate bar having a main body portion and a raised portion thereover having a series of grooves in the upper surface thereof in one .direction and a supplemental series of similar grooves at an angle to the grooves of said first maimed-series,- to forma. multiplicity of bosses therebetween, each of said-bosses having a plurality of substantially horizontal passages therethrough arranged at an angle to'each other, the open ends of the passages of each boss being in register with the open ends of corresponding passages in adjacent bosses, and said main body portion having a vertical bore, beneath each boss, joining the passages through said boss, whereby a thorough difit'usion of airv results through the fuel over said grate bar.

3. As an article of manufacture, a grate bar comprising 'a main body portion having a plurality of geometrically arranged vertical bores therethrough, and an integral cap over each bore, each cap consisting of an imperforate plate substantially parallel to said body portion and a plurality of spaced supports of relatively small area for maintaining said plate at a 7 distance above said body portion and to form air passages therebetween communicatiniwlth the respective bore.

4:. s an articleof manufacture, a grate predetermined me ias bar comprising a main body portion; 1;;

a pluralityof geometrically'arranged vein tical bores therethrough, and an integral cap over each bore, each cap consisting oi an iinperforate plate substantially parallel with said body portion and a plurality of tical bores therethrou'gh, and an integral.

cap over each bore, each cap consisting of with said body spaced supports of relatively small area for maintaining said plate .at a predetermined distance above saidbody portion, the corresponding supports of adjacent caps be ing arranged ingroups whereby the air passages formed between the'supports of each cap register with the corresponding passages of adjacent caps.

In testimony whereof I have "signed my name to this specification in the presence of the subscribing witnesses.

CHARLES WILLIAM HOPES,

Witnesses:

OnAnLns Winners, Enwano H. Wnnsrnn.

50 an, imperforate plate substantially parallel portion and a plurality of 

